If you're still squatting and pulling in running shoes, punch yourself in the face.
Excellent squatting/lifting shoes, in ascending price order:
Chucks:
cheapest, most available, flat/hard sole, battle-proven and popular.
VS Athletics Weightlifting Shoe 1:
$45, on sale
VS Athletics Weightlifting Shoe 2:
$71
EDIT:
Inzer Pillar:
Just so you know it exists.
Some ludicrously expensive shoes from Titan
I know Metal makes a lifting shoe, but they're apparently sold out.